CN112216554A - Overcurrent thermal protector - Google Patents
Overcurrent thermal protector Download PDFInfo
- Publication number
- CN112216554A CN112216554A CN202011042318.8A CN202011042318A CN112216554A CN 112216554 A CN112216554 A CN 112216554A CN 202011042318 A CN202011042318 A CN 202011042318A CN 112216554 A CN112216554 A CN 112216554A
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- heating wire
- contact
- temperature sensing
- thermal protector
- bimetallic strip
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/02—Details
- H01H37/32—Thermally-sensitive members
- H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
- H01H37/54—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting
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- Thermal Sciences (AREA)
- Thermally Actuated Switches (AREA)
Abstract
The utility model relates to an overcurrent thermal protector, including heating wire, transition connection spare, the outer utmost point of connecing of second, stationary contact, transition connection spare, movable contact, temperature sensing bimetallic strip, heating wire one end is connected with transition connection spare, and the heating wire other end is connected with the outer utmost point of connecing of second, and movable contact and temperature sensing bimetallic strip electricity are connected, and stationary contact and transition connection spare electricity are connected, and movable contact and stationary contact opposite face are provided with the coating, and heating wire main part maps in the mid portion of temperature sensing bimetallic strip. The heating wire is in a solenoid shape, the main body part of the heating wire is a solenoid part, a winding shaft of the heating wire is perpendicular to a line between a moving contact and a lining nail on the temperature sensing bimetallic strip, and the solenoid part of the heating wire is arranged below the middle part of the temperature sensing bimetallic strip. The main body part of the heating wire is not mapped on the transition connecting piece and the second external electrode. The contact point of the movable contact and the fixed contact is the thickest part of the coating. The electric heating wire temperature sensing device is reasonable in structure, high in utilization rate of the electric heating wire, fast in temperature sensing, excellent in product performance, long in service life, low in cost and good in safety.
Description
Technical Field
The present application relates to an overcurrent thermal protector, belonging to a component in the motor thermal protector, which is used for protecting overcurrent and overtemperature of a motor or other control circuit boards.
Background
At present, a motor is generally provided with a thermal protector which mainly plays the roles of overcurrent and overtemperature rise protection. When the motor is used, the thermal protector is tightly attached to the motor shell, when a large current flows through the motor, a heating element in the thermal protector instantly generates large heat to cause the bimetallic strip to bend and turn over, and the movable contact is disconnected, so that the protection effect of overload current is achieved; in addition, when the motor works for a long time due to some reason, the temperature of the motor shell is overhigh, and after heat generated by the heating element in the thermal protector is superposed, the bimetallic strip is heated, bent and overturned, the movable contact is disconnected, and the protection effect of overtemperature rise is achieved.
Chinese patent No. ZL200410098345.1 discloses an invention patent named "low current motor protector", which has the following main structure: the spiral electric heating wire is connected with the two separated metal shells by adopting spot welding, the metal bottom plate and the two separated metal shells are separated by using a high-temperature resistant insulating part, and after the parts are connected, a hot protector power-on loop is formed; specifically, the patent features include: the heater comprises a metal shell and a flange on the metal shell, wherein a first cover part and a second cover part which are separated from each other are arranged on the metal cover, at least one of the first cover part and the second cover part forms a circular arch structure, a heater is accommodated in the circular arch structure, and a gasket, namely a non-metal insulating part, is arranged between the metal shell and the metal cover. The above patent has the following disadvantages in practical use:
1. the solenoid-shaped electric heating wire in the prior art is parallel to the connecting line of the moving contact and the lining nail on the temperature sensing bimetal, and the length direction of the winding shaft of the electric wire is consistent with that of the temperature sensing bimetal. Because the turning and bending functions of the temperature sensing bimetallic strip are realized by the middle part of the temperature sensing bimetallic strip, the heating wire in the prior art only has the heating value of the middle part to act on the turning and bending of the temperature sensing bimetallic strip after heating, the heating values of the front part and the rear part of the rest heating wire have no effect on the turning and bending of the temperature sensing bimetallic strip, the conditions of low utilization rate of the heating value of the heating wire and waste of materials of the front part and the rear part of the heating wire exist, and the redundant heat is concentrated on the metal base, so that.
2. The spiral part (main heating part) of the solenoid-shaped electric heating wire is arranged in the groove of the metal shell and is arranged at the bottom of the metal shell, and the distance between the spiral part and the temperature sensing bimetallic strip is long, so that the temperature difference sensed by the temperature sensing bimetallic strip can be caused, the electric heating wire needs to generate more heating amount, the requirement on the electric heating wire is high, and the cost of the electric heating wire is increased.
Referring to fig. 1 and 2, a patent ZL200410098345.1 is schematically shown in fig. 2, a temperature sensing bimetal 2 is formed by punching at a middle part 2-1 of the temperature sensing bimetal by using a forming punch, and the turning and bending function of the temperature sensing bimetal 2 after sensing temperature is realized by the middle part 2-1 of the temperature sensing bimetal.
Referring to fig. 1, a moving contact 3 is welded at the tail end 2-3 of a temperature-sensing bimetallic strip 2, and the front end 2-2 of the temperature-sensing bimetallic strip is welded with a shell 1 through a lining nail 4; the coiling axis of the electric heating wire 6 is basically parallel to the connecting line a of the movable contact 3 and the lining nail 4. When the motor passes through a large current, the electric heating wire 6 generates heat, the heating wire heating value close to the middle part 2-1 of the temperature sensing bimetallic strip 2 can act on the overturning and bending of the temperature sensing bimetallic strip 2, the heating values of the front and the rear parts of the rest of the electric heating wires 6 have slow response to the overturning and bending of the temperature sensing bimetallic strip 2, the heating value of the electric heating wire 6 is wasted, and the corresponding electric heating wire material is also wasted.
Referring to fig. 2, a solenoid portion 6-1 (a main heating portion) of the solenoid-shaped electric heating wire 6 is installed in a groove of a metal housing (8, 9) and is far away from the temperature sensing bimetal 2, so that the temperature sensing performance of the temperature sensing bimetal 2 is poor, the electric heating wire 6 needs to generate more heat, the requirement on the electric heating wire 6 is high, the safety is reduced, and the corresponding cost is increased.
FIGS. 3 and 4 are schematic diagrams of a thermal protector of prior art 2 (publication No. CN 207097767U); the heating wire 66 is wound around the axis substantially parallel to the line b connecting the movable contact 33 and the pin 44. When the motor passes a large current, the heating wire 66 generates heat, the heating wire 66 near the middle part 2-1 of the temperature sensing bimetal 2 generates heat to act on the overturning and bending of the temperature sensing bimetal 2, the heating values of the front and rear parts of the remaining heating wire 66 react slowly to the overturning and bending of the temperature sensing bimetal 2, the heating value of the heating wire 66 is wasted, and the corresponding heating wire material is also wasted. The solenoid-shaped heating wire 66 the solenoid part 66-1 (the main heating part) is installed in the insulating base 88, and is far away from the temperature sensing bimetal 2, which causes the temperature difference sensed by the temperature sensing bimetal 2, the heating wire 66 needs to generate more heat, the requirement for the heating wire is high, the safety is reduced, and the corresponding cost is increased. The relationship of the disadvantages is substantially the same as described above.
The static contact and the movable contact in the motor thermal protector are easy to generate instant heating and spark at the contact moment, so that the contact points are easy to generate oxidation and electrolysis in the multi-frequency process of use. In order to increase the frequency of use of the contact, increase its contact effect and increase the electrical conductivity of the contact, the contact working surface is coated with a silver layer, collectively referred to as silver contacts, the thicker the silver layer, the longer the life of the contact system and the more conductive the contact. Generally, the working surface of a static contact in a motor thermal protector is a plane, and the working surface of a moving contact is a spherical surface, so that the static contact and the moving contact are in point contact. The moving contact is usually manufactured by using a cold heading composite process, so that the thickest part of the silver layer of the moving contact is at the highest point of the ball head surface of the moving contact.
Fig. 5 is a schematic diagram of a contact system of a conventional thermal protector, in which a stationary contact 1 'is fixedly connected to a metal housing 8 (i.e., a transition connector), a moving contact 3 is fixedly connected to a temperature-sensing bimetal 2, and the stationary contact 1' and the moving contact 3 are engaged with each other to form the contact system of the thermal protector. Because the temperature-sensing bimetallic strip 2 has a certain bending radian, the thickest part (the highest point of the ball head surface) a ' of the silver layer on the movable contact 3 in the prior art is not contacted with the working surface 1-1 ' of the fixed contact 1 '. Therefore, the utilization rate of the silver layer on the movable contact 3 in the existing contact system is low, and the design cost is wasted. In order to prolong the service life of the contact system, the thickness of the silver layer of the whole spherical surface of the movable contact can be increased, and the corresponding cost is increased.
Disclosure of Invention
The overcurrent thermal protector aims to overcome the defects in the prior art, and is reasonable in structural design, excellent in product performance, low in cost, good in safety and long in service life.
The technical scheme adopted by the application for solving the technical problems is as follows: the utility model provides an overcurrent thermal protector, includes heating wire, transition connection spare, the second external electrode, stationary contact, transition connection spare, movable contact, temperature sensing bimetallic strip, and heating wire one end is connected with transition connection spare, and the heating wire other end is connected with the second external electrode, and movable contact and temperature sensing bimetallic strip electricity are connected, and stationary contact and transition connection spare electricity are connected, and movable contact and stationary contact opposite face are provided with the coating that is used for strengthening electric conductivity, characterized by: the heating wire main body (mainly heating) part is mapped (projected) at the middle part of the temperature sensing bimetallic strip and cannot be mapped to the two ends of the temperature sensing bimetallic strip, so that the heating wire main body part is mapped at the middle part of the temperature sensing bimetallic strip in a centralized manner, the heating amount is concentrated at the middle part of the temperature sensing bimetallic strip, the temperature sensing is fast, the required energy is less, the heat is less wasted on the two ends of the temperature sensing bimetallic strip, the transition connecting piece and the second external electrode, and the safety is improved.
Preferably, the heating wire described in the present application is in a solenoid shape, a main portion of the heating wire is a solenoid portion, a winding axis of the heating wire is perpendicular or substantially perpendicular to a connecting line between the moving contact and the lining nail on the temperature sensing bimetal, and the solenoid portion of the heating wire is located below a middle portion (working area) of the temperature sensing bimetal.
Preferably, the main body part of the heating wire is not mapped on the transition connecting piece and the second external electrode (the projections of the main body part of the heating wire on the upper and lower planes of the transition connecting piece and the upper and lower planes of the second external electrode are all outside the transition connecting piece and the second external electrode), the main body part of the heating wire is far away from the transition connecting piece and the second external electrode, the heat loss is less, the heat protector is not easy to generate heat, and the safety is good.
The heating wire described herein may also take other forms, such as a flat plate-like, disk-like heating wire or a corrugated heating wire, etc.
The contact point of the movable contact and the fixed contact is the thickest part of the coating, so that the utilization rate of the coating is improved, and the service life is prolonged.
The transition connecting piece is provided with a static contact connecting bulge with inclination, the static contact is electrically connected with the transition connecting piece through the static contact connecting bulge, the inclination angle of the static contact connecting bulge is generally 5-20 degrees, and after the static contact is welded with the transition connecting piece, the inclination angle of the working surface of the static contact and the upper and lower planes of the transition connecting piece is also 5-20 degrees.
Preferably, the bottom surface of the stationary contact is fixed on the transition piece, the bottom surface of the stationary contact and the working surface of the stationary contact have a slope, and the slope (included angle) between the bottom surface of the stationary contact and the working surface of the stationary contact is 5-20 degrees. The inclination angle of the working surface of the stationary contact and the upper and lower planes of the existing transition connecting piece is also 5-20 degrees.
The thermal protector contact system can also realize that the contact point of the movable contact and the fixed contact is the thickest part of the coating by other technical means, for example, the bending part is arranged on the temperature sensing bimetallic strip, so that the opposite contact point of the movable contact and the fixed contact is the thickest part of the coating, and the coating on the movable contact is fully utilized.
The coating described herein may also be applied to the entire moving contact head, e.g., only in a portion of the moving contact head, as long as the contact point between the moving contact and the stationary contact is the thickest coating.
The intersection point of the central axis of the movable contact and the spherical surface of the coating is the contact point of the movable contact and the fixed contact. The coating is a silver layer.
Compared with the prior art, the application has the following advantages and effects: the heating wire has the advantages of reasonable design structure, high utilization rate of heating value of the heating wire, quick temperature sensing of the temperature sensing bimetallic strip, excellent product performance, low cost, good safety and long service life.
Drawings
Fig. 1 is a partial bottom view of prior art 1 (patent No. ZL 200410098345.1) with the first cover, the second cover, the stationary contact and the insulation liner removed for ease of illustration;
FIG. 2 is a schematic cross-sectional view of prior art 1;
FIG. 3 is a bottom view of prior art 2 (patent publication No. CN 207097767U);
FIG. 4 is a schematic cross-sectional view of prior art 2;
FIG. 5 is a schematic diagram of a prior art thermal protector contact system;
fig. 6 is an exploded view of the overcurrent thermal protector according to embodiment 1 of the present application;
FIG. 7 is a schematic view of a base assembly according to embodiment 1 of the present application;
FIG. 8 is a partial bottom view of example 1 of the present application with the transition piece, second external electrode, liner and insulation liner removed for ease of illustration;
FIG. 9 is a sectional view of the present application in example 1;
FIG. 10 is a schematic structural view of a base assembly according to embodiment 2 of the present application;
FIG. 11 is a schematic structural view of a base assembly according to embodiment 3 of the present application;
FIG. 12 is a schematic diagram of the structure of one embodiment of a contact system according to an embodiment of the present application;
fig. 13 is a schematic structural diagram of another embodiment of a contact system according to an embodiment of the present application.
Detailed Description
The present application will be described in further detail below with reference to the accompanying drawings by way of examples, which are illustrative of the present application and are not limited to the following examples.
Example 1:
referring to fig. 6, the overcurrent thermal protector of the present application includes a first external electrode 10, a temperature-sensing bimetal 20, a moving contact 30, a lining nail 40, an insulating paper 50, a heating wire 60, a stationary contact 70, a transition connector 80, and a second external electrode 90, where the first external electrode 10, the temperature-sensing bimetal 20, the moving contact 30, the transition connector 80, the heating wire 60, and the second external electrode 90 may be sequentially connected in series to form an electrical circuit, and may be disconnected when an overcurrent or an overheat occurs, thereby forming the overcurrent thermal protector of the present application.
Referring to fig. 7, one end of the heating wire 60 is connected to the transition connector 80, the other end of the heating wire 60 is connected to the second external electrode 90, and the stationary contact 70 is connected to the transition connector 80, thereby forming a base assembly 101 according to the present application.
Referring to fig. 8, the movable contact 30 is welded to the tail end 20-3 of the temperature-sensing bimetal 20, and the front end 20-2 of the temperature-sensing bimetal 20 is welded to the first external electrode 10 through the lining nail 40, thereby forming the housing assembly 102 of the present application. The connecting line C between the moving contact 30 and the lining pin 40 is substantially perpendicular to the winding axis of the heating wire 60, the solenoid portion 60-1 (the main heating portion) of the heating wire 60 is just below the middle portion (the working area) 20-1 of the temperature sensing bimetal 20, and the temperature sensing bimetal 20 can fully absorb the heating value of the heating wire 60. The heating wire 60 has a high utilization rate of heat generation, and the length (distance along the winding axis direction of the heating wire 60) of the solenoid part 60-1 of the heating wire 60 is relatively short, compared with the prior art, the heating wire has a high utilization rate, low cost and good safety.
Referring to fig. 6, 7 and 8, the base assembly 101, the housing assembly 102 and the insulating paper 50 of the embodiment of the present application are connected and assembled to form the overcurrent thermal protector of the present application. Therefore, the structure design of the temperature sensing bimetallic strip is reasonable, the heating wire is high in heat productivity utilization rate, the temperature sensing bimetallic strip senses the temperature quickly, the product performance is excellent, the cost is low, and the safety is good.
Referring to fig. 9, the solenoid portion 60-1 of the heating wire 60 is located between the transition connection member 80, the second external electrode 90 and the temperature sensing bimetal 20, and is close to the temperature sensing bimetal 20, when the heating wire 60 heats, the temperature sensing bimetal 20 can quickly sense the heat generated by the heating wire 20, and the temperature sensing bimetal 20 senses the temperature, so that the protector can quickly perform a protection function; in addition, since the solenoid portion 60-1 is not overlapped with the transition piece 80 and the second external pole 90 in the up-down direction or only overlapped with the edge portion, the distance between the solenoid portion 60-1 and the transition piece 80 and the second external pole 90 is far, so that heat is not easily concentrated on the transition piece 80 and the second external pole 90, and the safety of the embodiment of the present application is improved.
Compared with the prior art, the invention has the following advantages and effects: the over-current thermal protector has the advantages of reasonable design structure, high utilization rate of heating value of the heating wire, excellent performance of the temperature sensing bimetallic strip temperature sensing block, and low product cost.
Example 2:
referring to fig. 10, the heating wire 60a of the present embodiment is a plate-type heating wire, and the rest of the structure of the present embodiment is the same as or equivalent to that of embodiment 1, and will not be described again.
Example 3:
referring to fig. 11, the heating wire 60b of the present embodiment is a wire plate type, and the rest of the structure of the present embodiment is the same as or equivalent to that of embodiment 1, and will not be described again.
Referring to fig. 12, one embodiment of the thermal protector contact system of the present application is comprised of a stationary contact 70, a transition piece 80, a movable contact 30, and a temperature sensitive bimetal 20; in contrast to the prior art, the present application adds a stationary contact attachment boss 70-1 to the transition piece 80, the stationary contact attachment boss 70-1 having a certain angle of inclination θ, typically 5 ° to 20 °. The fixed contact 70 is fixedly connected to the fixed contact connecting bulge 70-1, the working surface 70-2 of the fixed contact 70 and the bottom plane of the transition connecting piece 80 have a certain inclination, the inclination angle theta is generally 5 degrees to 20 degrees, after the thermal protector contact system is formed, the thickest part a of the coating 30-1 of the movable contact 30 (the position where the spherical surface of the coating 30-1 is farthest away from the other surface of the coating 30-1, namely the intersection point of the central axis of the movable contact 30 and the spherical surface of the coating 30-1 in the embodiment, the coating 30-1 for enhancing the electrical conductivity adopts a silver layer) is contacted with the working surface 70-2 of the fixed contact 70, the thickest part a of the coating on the movable contact 30 is fully utilized to prolong the service life of the contact system, enhance the electrical conductivity and reduce.
Referring to fig. 13, in another embodiment of the thermal protector contact system of the present application, the thermal protector contact system of the present application can be configured at an angle of inclination of 5 ° to 20 ° on the stationary contact 70; the cross section of the stationary contact 70 of this embodiment is trapezoidal, and a certain slope is formed between the bottom surface 70-3 (the surface connected to the transition piece 80) of the stationary contact and the working surface 70-2 (the surface corresponding to the movable contact 30) of the stationary contact, and the slope angle is generally 5 to 20 degrees. The bottom surface 70-3 of the stationary contact is fixedly connected to the transition piece 80, the inclination angle of the working surface 70-2 of the stationary contact to the upper and lower planes of the existing transition piece 80 is also 5-20 degrees, and the rest of the thermal protector contact system is the same as that of the previous embodiment, has the same functions and is not described one by one.
The thermal protector contact system of the present application can also realize that the contact point of the moving contact 30 and the fixed contact 70 is the thickest part of the coating 30-1 by other technical means, for example, a bending part is arranged on the temperature sensing bimetallic strip 20, and the opposite contact point of the moving contact 30 and the fixed contact 70 is the thickest part of the coating 30-1 by the bending part, so as to fully utilize the coating 30-1 on the moving contact 30.
The coating 30-1 described herein may also not completely coat the entire moving contact 30 head (the portion facing the stationary contact 70), such as only a portion of the moving contact 30 head, as long as the point of contact of the moving contact 30 with the stationary contact 70 is at the thickest point of the coating 30-1.
The above description is only illustrative of the structure of the present application; moreover, the names of the components of the present application may be different, and all equivalent or simple changes made according to the structure, characteristics and principles described in the present application are included in the protection scope of the present application.
Claims (10)
1. The utility model provides an overcurrent thermal protector, includes heating wire, transition connection spare, the second external electrode, stationary contact, transition connection spare, movable contact, temperature sensing bimetallic strip, and heating wire one end is connected with transition connection spare, and the heating wire other end is connected with the second external electrode, and movable contact and temperature sensing bimetallic strip electricity are connected, and stationary contact and transition connection spare electricity are connected, and movable contact and stationary contact opposite face are provided with the coating that is used for strengthening electric conductivity, characterized by: the heating wire main body part is mapped on the middle part of the temperature sensing bimetallic strip.
2. An overcurrent thermal protector according to claim 1, wherein: the heating wire is in a solenoid shape, the main body part of the heating wire is a solenoid part, a winding shaft of the heating wire is vertical to a connecting line between a moving contact and a lining nail on the temperature sensing bimetallic strip, and the solenoid part of the heating wire is arranged below the middle part of the temperature sensing bimetallic strip.
3. An overcurrent thermal protector according to claim 1, wherein: the main body part of the electric heating wire is not mapped on the transition connecting piece and the second external electrode.
4. An overcurrent thermal protector according to claim 1, wherein: the electric heating wire is a flat plate-shaped disc-shaped electric heating wire or a corrugated electric heating wire.
5. An overcurrent thermal protector according to claim 1, wherein: the contact point of the movable contact and the fixed contact is the thickest part of the coating.
6. An overcurrent thermal protector according to claim 5, wherein: the transition connecting piece is provided with a static contact with inclination to connect the bulge, and the static contact is electrically connected with the transition connecting piece through the static contact to connect the bulge.
7. An overcurrent thermal protector according to claim 6, wherein: the inclined angle of the static contact connecting bulge is 5-20 degrees.
8. An overcurrent thermal protector according to claim 5, wherein: the bottom surface of the static contact is fixed on the transition connecting piece, and an inclination is formed between the bottom surface of the static contact and the working surface of the static contact.
9. An overcurrent thermal protector according to claim 8, wherein: the inclination between the bottom surface of the static contact and the working surface of the static contact is 5-20 degrees.
10. An overcurrent thermal protector according to claim 5, wherein: and the intersection point of the central axis of the movable contact and the spherical surface of the coating is the contact point of the movable contact and the fixed contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011042318.8A CN112216554A (en) | 2020-09-28 | 2020-09-28 | Overcurrent thermal protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011042318.8A CN112216554A (en) | 2020-09-28 | 2020-09-28 | Overcurrent thermal protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112216554A true CN112216554A (en) | 2021-01-12 |
Family
ID=74052232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011042318.8A Pending CN112216554A (en) | 2020-09-28 | 2020-09-28 | Overcurrent thermal protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112216554A (en) |
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| CN103377852A (en) * | 2012-04-17 | 2013-10-30 | 特密·格拉特步股份有限公司 | Temperature-dependent switch with contact part as heating resistor |
| CN203721508U (en) * | 2014-01-02 | 2014-07-16 | 温州铁通电器合金实业有限公司 | Silver contact |
| CN204289262U (en) * | 2015-01-14 | 2015-04-22 | 常州市艾诺电子科技有限公司 | A kind of hermetically-sealed construction thermal protector |
| CN105529216A (en) * | 2016-01-28 | 2016-04-27 | 苏州工业园区凯恩电子科技有限公司 | Outage reset thermal protector |
| CN205542592U (en) * | 2016-01-28 | 2016-08-31 | 苏州工业园区凯恩电子科技有限公司 | Hot protector of power -off reset |
| CN107248477A (en) * | 2017-07-14 | 2017-10-13 | 杭州星帅尔电器股份有限公司 | The installation method of Miniature heat protector and its heating wire |
| CN210200632U (en) * | 2019-09-24 | 2020-03-27 | 漳州雅宝电子有限公司 | Overcurrent and overtemperature protector capable of being reset manually in power-off mode |
| CN211238101U (en) * | 2019-12-30 | 2020-08-11 | 扬州宝珠电器有限公司 | Improved thermal overload protector |
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2020
- 2020-09-28 CN CN202011042318.8A patent/CN112216554A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1526275A (en) * | 1974-09-24 | 1978-09-27 | Texas Instruments Italia Spa | Temperature sensitive circuit breakers |
| CN201122558Y (en) * | 2007-08-17 | 2008-09-24 | 森萨塔科技公司 | Temperature current protector |
| JP2010086675A (en) * | 2008-09-29 | 2010-04-15 | Sobo Yu | Circuit protection structure performing double temperature-sensitive interruption |
| CN103377852A (en) * | 2012-04-17 | 2013-10-30 | 特密·格拉特步股份有限公司 | Temperature-dependent switch with contact part as heating resistor |
| CN203721508U (en) * | 2014-01-02 | 2014-07-16 | 温州铁通电器合金实业有限公司 | Silver contact |
| CN204289262U (en) * | 2015-01-14 | 2015-04-22 | 常州市艾诺电子科技有限公司 | A kind of hermetically-sealed construction thermal protector |
| CN105529216A (en) * | 2016-01-28 | 2016-04-27 | 苏州工业园区凯恩电子科技有限公司 | Outage reset thermal protector |
| CN205542592U (en) * | 2016-01-28 | 2016-08-31 | 苏州工业园区凯恩电子科技有限公司 | Hot protector of power -off reset |
| CN107248477A (en) * | 2017-07-14 | 2017-10-13 | 杭州星帅尔电器股份有限公司 | The installation method of Miniature heat protector and its heating wire |
| CN210200632U (en) * | 2019-09-24 | 2020-03-27 | 漳州雅宝电子有限公司 | Overcurrent and overtemperature protector capable of being reset manually in power-off mode |
| CN211238101U (en) * | 2019-12-30 | 2020-08-11 | 扬州宝珠电器有限公司 | Improved thermal overload protector |
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